BTA20.3-NC-DD-VD Bosch Rexroth Indramat
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The Bosch Rexroth Indramat BTA20.3-NC-DD-VD is part of the BTA20 Machine Control Boards series and features front panel protection rated at IP65 with a varnished aluminum front. It offers 2 E-stop circuits, can support up to 8 switch elements, and provides an output current of 200 mA per channel. The board includes RS232 and RS422 communication inputs, and its overall dimensions are 407 by 169 by 119 mm.
Internal Product Review
The BTA20.3-NC-DD-VD is a Bosch Rexroth machine control board with IP65 front-panel protection and varnished aluminum construction. Dual E-stop circuits and 4-bit Gray code override encoding make the unit an excellent choice for precise, safety-focused machine control.
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Product Description:
The BTA20.3-NC-DD-VD machine control board is produced by Bosch Rexroth Indramat for the BTA20 Machine Control Boards series. It serves as an operator and safety interface, routing discrete signals from push-button arrays and emergency-stop stations to higher-level motion or CNC controllers in automated equipment. Two E-stop circuits are wired directly on the board so actuators can be disconnected immediately if a fault is detected. Each switch element provides two contacts for duplicated signaling, and the varnished aluminum front panel carries one RS-232 input, one RS-422 input, and one RS-422 output for field communication.
Electrically, the internal logic rail offers a +5 V bus source limited to 50 mA, which is enough for sensor references and status LEDs without overloading the backplane. Output driver channels can sink or source up to 200 mA each, permitting direct actuation of relays or optocouplers. The board is fitted behind a front panel with an IP65 rating, so dust and low-pressure water jets cannot reach the circuitry when the cabinet door is closed. Installation uses a cutout that matches the mounting dimensions of 375 × 138 × 119 mm. The override potentiometer uses 4-bit Gray code to reduce miscounts during rapid adjustments.
The complete assembly, including rear connectors and locking hardware, occupies an overall envelope of 407 × 169 × 119 mm, so wiring bends must account for this depth. Up to 8 switch elements can be populated, letting the same board host jog, mode-select, or feed-hold functions beside the safety channels. The adjustable feed override spans from 0 % to 120 %, enabling the machine to be ramped down for setup or briefly driven above nominal when cycle time is critical. This range helps prevent accidental operation outside the intended setting window.
